I can tell that the closest you get to the outdoors is walking to your car.
You don't usually call the police when you find someone in a private wooded area. You just ask them to leave and, amazingly enough, they do! Most of the time they are either not aware that they are on posted property or they are aware but are not about to kill you over it. You call the cops every time you find a trespasser and you are going to spend a lot of time in court.